Polishing apparatus.



PATENTED DEC. 4, 1906.

A. PONGRACZ. POLISHING APPARATUS.

APPLICATION FILED JULY 5. 1904. RENEWED NOV.1. 1906.

2 SHEETS-SHEET 1.

fl 7 I A No. 837,502. PATENTED DEC. 4, 1906.

A. PONGRACZ. POLISHING APPARATUS.

APPLIUATION FILED JULY 5. 1904. RENEWED NOVA, 1906.

2 SHEETS-SHEET 2.

' scription of an illustrative embod'ment of erably operating a rotarybrush that enga es is supported in a bearing 5, secured to the afterprevious application of wax automat- UNITED STATES PATENT, orrron ALFREDPONGRACZ, LQSONCZ, AUSTRIA-HUNGARY.

POLISHING APPARATUS To all whomit may concern.-

Be it known that I, ALFRED PONGRACZ, engineer, a subject of the Emperorof AustriaHungary, and a resident of Losoncz, Austria-Hungary, haveinvented certain new and useful Improvements in or Relatin to PolishingApparatus; and I hereby decare the following to be a full, clear, andexact dethe invention, such as Will enab e others skilled in the art towhich it appertains to make and use the same.

This invention relates to apparatus which on being guided along thefloor to be treated ically polishes the floor, so that no hand labor isnecessary except that required in guiding the apparatus, a suitableelectric motor prefthe floor with its flat face that is provided withbristles and self-clearing channels.

In the illustrative form of this invention shown in the drawings, inwhich the same numerals refer to similar arts, Figure 1 shows theapparatus in side e evation. Fig. 2 is a plan view of the under side ofa polishingbrush.

The frame of the appa atus consists of a bracket 1, Fig. 1, upon whichan electric niotor 2 is mounted in such a mannerthat its center ofgravity is in the vertical axis of the apparatus. Owing to this methodof mounting the electric motor the stability of the apparatus isinsured. I

The armature-spindle rojecting from the motor-casing is provi(led witl1a gear-wheel 3, engaging with a larger gear-wheel 4, carried on aspindle. One end of this spindle motor-easing, the other end passingthrough a bearing 6 on the lower arm of the bracket 1 and carrying thepolishing-brush 7 or other finishing member. Therefore when the motorisstarted the brush begins to rotate, and the parts of the floor overwhich the apparatus is guided by the aid of the handle 17 of theguide-rod 9,whieh is pivoted to the frame, are olished or finished.

Tlie polishing-brush 7, Fig. 1, comprises a disk provided withstiffening-ribs 10, into which bristles'l], Fig. 2, are inserted in suchI Specification of Letters Patent.

Application filed J uly 5, 1904- Eenewed November 1, 1906. Serial, No.341.623.

Patented Dec. 4, 1906.

a manner as to form several 0 wring-passages 24, extending from thecentral portionof the brush to the periphery in the direction oppo siteto that of the rotation, as shown by the arrows in the drawings, so thatthe dust produced under the brush during polishing is projected outwardand automatically discharged while the apparatus is working.

An electrical current is supplied to the motor through a long flexibleconductor 16,

Ior polishing iloors the brush 7 is screwed on the spindle of the wheel4, the current turnedon, and the a paratus the floor by means of t ehandle 9.

Having described an illustrative form of guided along this apparatus,-to the details of which I do not desire to be limited, what is claimedas new, and what it is desired to secure by Letters Patent, is set forthin the appendedclaims.

I claim.

1. In polishing apparatus, a frame, a disk brush revolubly mounted insaid frame, a

motor in said frame and geared to said brush 1 to operate the same, saidmotor being sub- I stantiallg guidingandlc pivoted to said frame.

2. In. polishing apparatus, a frame, a disk brush mounted in said frameto revolve about a vertical axis, a motor mounted in said frame andhaving its center of gravity substantially in line with the axis of saidbrush and gearing to operate said brush from said motor. I

3. In polishing apparatus, a frame, a disk brush revolubly mounted insaid frame to revolve about a vertical axis, a motor mounted in saidframe with its center of gravity substantially above the axis of saidbrush, the armature-spindle being inclined at an angle to said axis andgearing to o erate said brush from said motor, the arts eing so arrangedthat the entire weig it of the motor is borne or carried by the brush.

4. In a polishing ap aratus, a Ushaped bracket havin arms 0 unequallength, the longer of whic is curved forming a bearing for the motor,the other end forming a bearing for the brush-spindle, a motor mountedin the bracket having its center of gravity above the axis of said brushand a feubstantie ily above the axis of the brush, a and the bracketrests upon the brush, subbrush mounted on the endof the spindle sup-'moving the polishing apparatus over the stantially as described. 10

In Witness whereof I have hereunto set my hand in presence of twoWitnesses.

ALFRED PONGRACZ.

ported within the arm of the bracket, the spindle, a gear mounted uponthe spindle and meshing with a gear of the motor, means for WVitnesses:

JOHN GERGENTRZ,

floor to be polished, the parts being so er- LOUIS VAINDORY.

ranged that the entire Weight of the motor

